论坛里搜集的一段INet请求http的代码

void CAbcdefDlg::OnButton1() { // TODO: Add your control notification handler code here BOOL bResult = FALSE; // 初始化WinInet 环境 HINTERNET hInternet = InternetOpen("Microsoft Internet Explorer", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, NULL); // 打开http session HINTERNET hSession = InternetConnect(hInternet, "192.168.19.43", 1111, "user", "123abc$", INTERNET_SERVICE_HTTP, 0, 0); // 打开http post 请求的句柄 char* szAccept[] = {"*/*", NULL}; HINTERNET hRequest = HttpOpenRequest(hSession, "POST", "/byweb/downloadfile?checi=D123&fazhan=上海&daozhan=广州", NULL, NULL, (LPCSTR*)szAccept, INTERNET_FLAG_NO_CACHE_WRITE, 0); // 准备发送的xml 数据，可以是任意长度 char post_data[] = ""; // 外发的header char headerLanguage[] = "Accept-Language: zh-cn\r\n"; char headerEncoding[] = "Accept-Encoding: gzip, deflate\r\n"; char headerContentType[] = "Content-Type: text/xml\r\n"; char headerContentLength[64]; sprintf(headerContentLength, "Content-Length: %d\r\n", strlen(post_data)); // 添加header 信息 bResult = HttpAddRequestHeaders(hRequest, headerLanguage, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE); bResult = HttpAddRequestHeaders(hRequest, headerEncoding, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE); bResult = HttpAddRequestHeaders(hRequest, headerContentType, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE); bResult = HttpAddRequestHeaders(hRequest, headerContentLength, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE); /*===================================================================== // 简单的发送数据的方法，可用来发送少量数据，或提交GET请求 //===================================================================*/ // bResult = HttpSendRequest(hRequest, NULL, 0, post_data, ); /*===================================================================== // 发送大量数据包的方法 //===================================================================*/ INTERNET_BUFFERS BufferIn = {0}; BufferIn.dwStructSize = sizeof( INTERNET_BUFFERS ); BufferIn.dwBufferTotal = strlen(post_data); bResult = HttpSendRequestEx(hRequest, &BufferIn, NULL, 0, 0); DWORD written = 0; bResult = InternetWriteFile(hRequest, (LPVOID)(LPCTSTR)post_data, strlen(post_data), &written); bResult = HttpEndRequest(hRequest, NULL, 0, 0); /*===================================================================== // 发送大量数据包结束 //===================================================================*/ LPSTR lpszData = NULL; // buffer for the data DWORD dwSize = 0; // size of the data available DWORD dwDownloaded = 0; // size of the downloaded data // 请求header 的大小，注意这里的bResult 为FALSE bResult = HttpQueryInfo(hRequest, HTTP_QUERY_RAW_HEADERS_CRLF, NULL, &dwSize, NULL); // 为接收header 分配内存空间 CHAR* lpHeadersA = new CHAR [dwSize]; // 接收http response 中的header bResult = HttpQueryInfo(hRequest, HTTP_QUERY_RAW_HEADERS_CRLF, (LPVOID) lpHeadersA, &dwSize, NULL); // 循环读取数据 while(1) { // 检查在http response 还有多少字节可以读取 if (!InternetQueryDataAvailable(hRequest,&dwSize,0,0)) { break; } else { // 分配内存 lpszData = new char[dwSize+1]; // 读取数据 if(!InternetReadFile(hRequest,(LPVOID)lpszData,dwSize,&dwDownloaded)) { delete[] lpszData; break; } else { // 处理的得到的数据... // 检查还有没有剩余数据 if (dwDownloaded == 0) break; } } } // 关闭句柄 InternetCloseHandle(hRequest); InternetCloseHandle(hSession); InternetCloseHandle(hInternet); // 注意：在使用HttpSendRequestEx 后，必须使用HttpEndRequest // 才能开始请求header 信息，接收数据。 }